Wireless Terminal U-SIG/EHT-SIG Signaling for Discontinuous RUs

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Solution Overview

Problem

Existing wireless LAN standards face challenges in providing high-speed data transmission for new multimedia applications, particularly in managing resource allocation and recognizing discontinuously allocated resources among multiple terminals.

Innovation Solution

A method and device for allocating resource units (RUs) to user equipment, utilizing a physical protocol data unit (PPDU) with a universal signal (U-SIG) and extremely high throughput (EHT)-SIG field to efficiently signal and recognize discontinuous channel allocations, supporting orthogonal frequency division multiple access (OFDMA) and multi-user MIMO.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If existing wireless LAN standards are used for high-speed data transmission, then backward compatibility is maintained, but data transmission speed and efficiency are insufficient for new multimedia applications

Engineering Contradiction:

Improvedata transmission speedVSAvoiddata transmission efficiency

Core Design Contradiction:

SpeedVSProductivity

Solution Approach 1:

The patent introduces new signal fields (U-SIG and EHT-SIG) with modified parameters including bandwidth indicators, resource unit allocation information, and multi-user MIMO configuration. These parameter changes enable higher data transmission speeds by optimizing channel allocation and resource distribution across multiple users and spatial streams, while maintaining compatibility with existing standards through incremental parameter evolution.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If resource allocation is simplified for ease of management, then device complexity is reduced, but the ability to recognize and manage discontinuously allocated resources among multiple terminals deteriorates

Engineering Contradiction:

Improveresource allocation managementVSAvoiddiscontinuous resource recognition

Core Design Contradiction:

Ease of operationVSLoss of information

Solution Approach 1:

The patent segments the frequency spectrum into multiple resource units (RUs) of different sizes (26, 52, 106, 242 tones) that can be independently allocated to different users. The U-SIG and EHT-SIG fields contain segmented resource allocation information including start tone indicators and size indicators for each RU. This segmentation enables precise tracking of discontinuously allocated resources while maintaining manageable complexity through standardized RU structures and systematic signaling mechanisms.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12407475B2Method for transmitting and receiving data in wireless communication system, and wireless communication terminal

Publication Date: 2025.09.02 WILUS INSTITUTE OF STANDARDS & TECHNOLOGY INC

AI summary

Disclosed is a method for transmitting and receiving a physical protocol data unit (PPDU) in a wireless communication system. A terminal receives a preamble of the PPDU from an access point (AP). The preamble includes a universal signal (U-SIG) field and an extremely high throughput (EHT)-SIG field, wherein the EHT-SIG field may be configured with at least one content channel on a frequency axis. Here, the number of the at least one content channel may be recognized on the basis of the U-SIG field. Subsequently, the terminal receives data of the PPDU on the basis of the U-SIG field and the EHT-SIG field.